Explain grashoff number

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The Grashoff number is a dimensionless number used in fluid dynamics to determine the dominance of buoyancy forces over viscous forces in a fluid flow.

The Grashoff number is defined as the product of the ratio of buoyancy forces to viscous forces and the square of the ratio of characteristic length to kinematic viscosity.
It is used to analyze natural convection flows and is particularly important in heat transfer applications.
A high Grashoff number indicates that buoyancy forces are dominant, while a low Grashoff number indicates that viscous forces are dominant.
For example, in a vertical pipe with hot fluid flowing upwards, a high Grashoff number would result in strong upward flow due to buoyancy forces.
In contrast, a low Grashoff number would result in a more sluggish flow due to the dominance of viscous forces.

Explain grashoff number

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